Just press space when the note gets onto the strum. Avoid pressing space when the halo note gets onto the strum.
Finally, a original idea by me. Although i credit @JeNaRoX_2 for the boy head and all of the sounds and @Good-Website for the hearts and @JoshiahAninations for the stage. This game is currently impossible, if you wanna play the version that works, copy and paste this v https://scratch.mit.edu/projects/584219324 or find it.